must secure
Verbo regular: secure - secured- secured

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I must secure
you must secure
he must secure
we must secure
you must secure
they must secure 	I must be securing
you must be securing
he must be securing
we must be securing
you must be securing
they must be securing	I must have secured
you must have secured
he must have secured
we must have secured
you must have secured
they must have secured	I must have been securing
you must have been securing
he must have been securing
we must have been securing
you must have been securing
they must have been securing	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I mustn't secure
you mustn't secure
he mustn't secure
we mustn't secure
you mustn't secure
they mustn't secure 	I mustn't be securing
you mustn't be securing
he mustn't be securing
we mustn't be securing
you mustn't be securing
they mustn't be securing	I mustn't have secured
you mustn't have secured
he mustn't have secured
we mustn't have secured
you mustn't have secured
they mustn't have secured	I mustn't have been securing
you mustn't have been securing
he mustn't have been securing
we mustn't have been securing
you mustn't have been securing
they mustn't have been securing	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
must I secure?
must you secure?
must he secure?
must we secure?
must you secure?
must they secure? 	must I be securing?
must you be securing?
must he be securing?
must we be securing?
must you be securing?
must they be securing? 	must I have secured?
must you have secured?
must he have secured?
must we have secured?
must you have secured?
must they have secured? 	must I have been securing?
must you have been securing?
must he have been securing?
must we have been securing?
must you have been securing?
must they have been securing? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
mustn't I secure?
mustn't you secure?
mustn't he secure?
mustn't we secure?
mustn't you secure?
mustn't they secure? 	mustn't I be securing?
mustn't you be securing?
mustn't he be securing?
mustn't we be securing?
mustn't you be securing?
mustn't they be securing? 	mustn't I have secured?
mustn't you have secured?
mustn't he have secured?
mustn't we have secured?
mustn't you have secured?
mustn't they have secured? 	mustn't I have been securing?
mustn't you have been securing?
mustn't he have been securing?
mustn't we have been securing?
mustn't you have been securing?
mustn't they have been securing?